2311649 has 4 divisors (see below), whose sum is σ = 2374164. Its totient is φ = 2249136.

The previous prime is 2311613. The next prime is 2311651. The reversal of 2311649 is 9461132.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1281424 + 1030225 = 1132^2 + 1015^2 .

It is a cyclic number.

It is not a de Polignac number, because 2311649 - 2¹² = 2307553 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2311669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31202 + ... + 31275.

It is an arithmetic number, because the mean of its divisors is an integer number (593541).

2^2311649 is an apocalyptic number.

It is an amenable number.

2311649 is a deficient number, since it is larger than the sum of its proper divisors (62515).

2311649 is an equidigital number, since it uses as much as digits as its factorization.

2311649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62514.

The product of its digits is 1296, while the sum is 26.

The square root of 2311649 is about 1520.4107997512. The cubic root of 2311649 is about 132.2230884715.

The spelling of 2311649 in words is "two million, three hundred eleven thousand, six hundred forty-nine".